## Monday, June 11, 2012

### Mean, Median and Mode

Measures of central tendency- A value that represents the centre of the data set (Mean, Median or Mode)
Data set is a group of numbers that you must arrange in order least to greatest.

example-
2 8 4 8 6 5 1 1 6 4 9
1 1 2 4 4 5 6 6 8 8 9

Mean- a measure of central tendency; the sum of a set of values divided by the number of values in the set.

example-
3 4 9 8
3+4+9+8=24
24 divided by 4 is..
6 --- So that means 6 is the mean.

Median- The middle number in a set of data after the data has been arranged in order.

example-
9 8 5 2 3
2 3 5 8 9 ----in this the middle is 5. so the median would be 5

3 6 7 8 9 5 7 9
3 5 6 6 7 7 8 9 ---- in this there are 2 middles... or none. So in this case 6 and 7 are in the middle so then the median would be 6.5

Mode- the most frequently occurring number in a Data set.

example-
3 5 6 8 4 8 9 8
3 4 5 6 8 8 8 9 ----- the number that appears most is 8... so then the mode is 8

Still don't get any of it? Then check this video out!

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